FR2655468A1 - METHOD FOR IMPLEMENTING A NUCLEAR FACILITY SURVEILLANCE ROUND. - Google Patents

Abstract

Method for implementing a surveillance round of a nuclear site (5) consisting in recording in a central computer (22) connected to a radiofrequency transmitter / receiver (24) a sequence of different survey points (12) grouping together sensors (10) constituting the round to be performed. This sequence is copied into a memory of a portable microcomputer (26) taken by the supervisor during the round and connected to a radiofrequency transmitter / receiver (28). Each reading point (12) is validated and this validation is transmitted to the central computer (22). The sensors are checked and any anomaly is reported to the central computer (22). All the checks carried out are recorded in the portable microcomputer (26) and copied at the end of the round into the central computer (22) so as to be processed.

Description

The subject of the present invention is a method

  implementation of a surveillance round.

  It applies in particular to surveillance

systematic of nuclear sites.

  The automatic operation of certain nuclear installations requires regular monitoring. Following a determined route, a supervisor performs a round during which he records the data delivered by sensors placed at different points in the installation; it checks and possibly modifies the functional state of equipment (for example, opening or closing a valve) Access to certain areas of the installations can be difficult, even dangerous, and it is good to also make sure that the security of the supervisor. At the end of the round, the results of the measurements made are generally stored and used for maintenance or processing purposes.

statistical.

  French Patent No. 2,585,145 discloses a process for monitoring an industrial installation. The operator in charge of the round ensures the identification of the sensors or of the equipment to be checked by reading a number. of coded identification attached to each sensor or equipment and to the automatic comparison of this identification number with a reference previously recorded in a control system, the control system delivering Following the comparison a validation signal The measurements carried out during the round are recorded in

the witness system.

  This type of process tends to make the operator less responsible. It ensures the effective passage of the operator to the measurement points. The analysis of the measurements made during the round takes place at the earliest, upon the operator's return to the central control station No decision concerning the operation of the installation

  industrial cannot be taken during the round.

  This time lag between the measurements and their analysis is detrimental to the proper functioning of the installation: any delay in consulting the results prevents maintenance actions

fast and efficient.

  The object of the present invention is to provide a process for implementing a very flexible round

  authorizing preventive maintenance actions.

  A "dialogue" between a central surveillance unit and the supervisor makes it possible to follow the latter's journey from measurement point to measurement point

  and thus ensure the smooth running of the round.

  This also makes it possible to report in real time any anomaly noted during a measurement and to take the necessary measures very quickly, without waiting for the supervisor's return. The supervisor is invested with more responsibilities: he can decide to carry out additional measures or changes in the functional status of equipment that were not originally planned, when defining

of the round route.

  In the method according to the invention, the supervisor plays an active role. He is assisted in his decisions by a portable microcomputer tool connected by a radio link to the central unit: following the detection of an anomaly, he may decide to suspend his round to carry out operations which seem necessary to him, while taking

  informed the central monitoring unit.

  More specifically, the present invention relates to a method of implementing a round of surveillance of a nuclear site on which are distributed survey points grouping together at least one sensor and / or at least one piece of equipment having a certain state. functional, the tour being carried out by an operator This process consists of: (A) beforehand, (a) recording, in a central computer connected to a radiofrequency transmitter / receiver, (i) a sequence of reading points, sensors to control and equipment to control and / or whose functional state is to be modified, this sequence constituting the round, (ii) information comprising at least reference values, tolerance thresholds, and assistance comments to the operator's decision concerning the reading points, the sensors to be checked and the equipment to be checked and / or whose functional state is to be modified, (b) copy the recording highly performed in (a) in a portable microcomputer connected to a radiofrequency transmitter / receiver, (B) during the round, (a) at each passage to a reading point, (i) carry out a validation attesting the passage to the point statement; at each validation, a location point signal is transmitted by the transmitter connected to the portable microcomputer to the receiver connected to the central computer and recorded in the central computer, (ii) checking the measurement points to be; the measuring points delivering information, record this information in the portable microcomputer, and compare it with the prerecorded information concerning these measuring points so as to detect any anomaly, (iii) check and / or modify the functional state of the equipment before the '' be, record information concerning this equipment and compare it to the pre-recorded information concerning this equipment so as to detect any anomaly, any anomaly detection in (ii) and in (iii) causing a transmission from the transmitter of the microcomputer towards the receiver of the central computer, (D) at the end of the round, the information recorded in the microcomputer is copied

  in the mainframe in order to be processed.

  The validation at each reading point attests to the passage of the supervisor: it makes it possible to follow him, via the central computer,

throughout the round.

  Thanks to the "dialogue" between the Computers, which allows the supervisor to keep Contact with the control room, any anomaly is immediately communicated to the central computer and Rescue or maintenance decisions can be made

in proper time.

  The transfer of the information recorded during the round to the central computer allows a history from round to round of the various measurements carried out. The features and benefits of

  the invention will appear better after the description

  which follows, given by way of explanation and in no way

Limi tati f.

  This description refers to a figure

  single annexed which schematically represents an industrial site on which rounds are made

  monitoring according to the method of the invention.

  This industrial site 5 includes automatic installations (not shown), the operation of which is controlled by sensors 10 scattered on site 5, but grouped around survey points 12 Equipment 11 having a certain functional state is also attached to these checkpoints. read; these equipments can

  be valves, switches, or the like.

  Each survey point 12 is located on site 5 and marked with a label supporting a point identification barcode. To locate a survey point 12, for example, site 5 can be divided into levels: level 1 corresponds to a building 14; level 2 corresponds to a part of the building designated as cell 16 level 3 corresponds to a part of the cell designated as unit 18 A unit 18 can

  include several reading points 12.

  In the figure, the building 14 is divided into two cells 16 separated by a dashed line The cells 16 are divided by dashed lines into units 18 The site 5 also includes at least one control room 20 in which at least one computer is installed central 22 connected to a radio frequency transmitter / receiver 24 This computer

  22 can be of the microcomputer type.

  Various data are contained in a general file which is kept up to date after each round This file recorded in the central computer 22 contains all the survey points 12 to which are assigned identification references enabling their location The file also contains the list of sensors 10 and equipment 11 grouped around the survey points 12 These sensors 10 and equipment 11 are identified by identification references Various information completes this list in the file, for example: the type of sensor (thermal, electrical, sensitive to radiation, sensitive to smoke) or equipment (valve, switch, elevator), geographic location, values or characteristics normally expected, tolerance thresholds, checks to be performed on the data collected during rounds, the values recorded during the various rounds already carried out, the date and time of these readings measurements, the units of measurement used and any other information enabling effective monitoring to be carried out, for example comments to assist in the decision

  each of the sensors and equipment.

  This file allows, among other things, the display on a video monitor of an industrial site map equipped with all survey points, sensors and

equipment to monitor.

  Before leaving for the round, the operator chooses from the central file a sequence of reading points 12, sensors 10 to be checked and equipment to be checked and / or whose functional state is to be modified This sequence is recorded in the central computer 22: it defines by the route of the round on the site 5 The information is also recorded (or part of this information, but at least the reference values, historical values corresponding to the last five readings for example, tolerance thresholds, and decision assistance comments) concerning reading points 12, sensors 10 and equipment

11 to watch.

  Standard routes with information about them are also available They avoid the operator having to redefine his complete route at each departure These standard routes can be modified

at will.

  When the sequence is established, a theoretical duration necessary for the journey between each reading point 12 is defined. This duration is recorded in a memory of the central computer 22 for each

  path between two reading points 12.

  Each round starts from the control room 20, where the supervisor copies the established sequence as well as the information relating thereto in a memory of a portable microcomputer 26 provided with a screen associated with a radiofrequency transmitter / receiver 28 Ce microcomputer 26 also has a gun

  for reading a barcode 30.

  Thanks to these data, the microcomputer 26, carried along during the round, guides the supervisor by indicating to him to which point of reading 12 is

  direct and the sensors 10 or equipment to be checked.

  At each passage to a reading point 12, the supervisor reads the bar code bearing the point identification reference with the gun This reading of the bar code constitutes validation of the operator's passage to reading point 12 The microcomputer 26 records the reading and assigns it a passage time thanks to an internal clock In addition, the microcomputer 26 displays on the screen a message confirming to the operator that the reading point is indeed that provided in the sequence constituting the round Otherwise, the display carried on the screen of the portable microcomputer indicates the normally scheduled reading point. At this stage the operator has the choice between confirming the modification of the planned order by confirming this information on the keyboard or go to the displayed reading point and repeat an identification reading by reading

bar code.

  At each reading of an identification reference of a reading point, a location signal is transmitted by the transmitter 28 connected to the portable microcomputer 26 to the receiver 24 connected to the central computer 22 The reception of the signal has for effect of triggering a clock internal to the computer 22 If the following validation is not carried out while the theoretical time between two validations, defined above, has elapsed, an alarm is triggered by the central computer 22 This alarm can be in firstly, a signal transmitted by the transmitter 24 associated with the central computer 22 to the receiver 28 associated with the portable microcomputer 26 This signal triggers a sound and / or visual emission or the display of a message on the microcomputer screen 26 The supervisor must then respond with a message that he enters the microcomputer 26 and which is transmitted by radio frequency transmission to the computer 22 In case of no In response, the computer 22 can alert a rescue team which intervenes all the more quickly when the location of the supervisor is known. At each reading point 12, the supervisor reads the information delivered by the sensors and records it in a memory of the portable microcomputer 26 It also performs the checks and / or changes in the functional state of the equipment 11 and records information

concerning this equipment.

  For each sensor 10 or equipment 11, the microcomputer 26 performs a comparison between this information and the prerecorded values corresponding to normal operation of the installations. This comparison as well as the definition of tolerance thresholds makes it possible to detect

a malfunction.

  After each entry of information concerning the sensors 10 or the equipment 11, the supervisor must carry out a validation When the validated value is non-standard, the microcomputer 26 transmits, via the transmitter 28, a message to the central computer 22 The latter, depending on the defective sensor 10 and the type of anomaly, alerts a maintenance team which can operate quickly and efficiently Eventually, the central computer 22 can automatically cut certain circuits

electric or other.

  When abnormal operation is observed, the supervisor can display the historical information stored in the portable microcomputer 26 and concerning the measurements carried out during the previous rounds. The portable microcomputer 26 also displays the decision-making aid comments and the supervisor can, depending on in the cases, change the order of passage at the survey points 12, check sensors 10 or equipment 11 not provided during the definition of the round, or even interrupt its round, while keeping the central computer 22 informed by

  through the radio frequency link.

  For each sensor 10 or equipment 11 controlled, the supervisor has the possibility of recording comments on the operation of the installations. These comments promote effective preventive maintenance since they make it possible to prevent incidents. For example, a maintenance team alerted by these comments can replace this or that part before it deteriorates, as soon as it shows signs

of failure.

  At the end of the round, the information read from the sensors 10 and contained in a memory of the portable microcomputer 26 is recorded in a memory of the central computer 22 so as to be processed there; the central file is also updated The processing can be a statistic over a large number of rounds of the changes in the information delivered by the sensors or an analysis

  drift of the indications noted on the sensors.

  We also get, at will, a paper edition

of all the information.

  The method according to the invention makes it possible to follow several supervisors from the same control room The permanent link between the central computer and the portable microcomputer

  enables quick and efficient decision-making.

  Thanks to this link and to the information 1 1 contained in the portable microcomputer, the supervisor can analyze abnormal situations and act accordingly; he is responsible for his actions, while remaining under the control of the central computer.

Claims (8)

Claims   1 Method for implementing a surveillance round of a nuclear site on which are distributed survey points grouping together at least one sensor and / or at least one equipment having a certain functional state, the round being carried out by an operator , characterized in that it consists of: (A) beforehand, (a) recording, in a central computer connected to a radiofrequency transmitter / receiver, (i) a series of reading points, sensor to be checked and equipment to be checked and / or whose functional state is to be modified, this sequence constituting the round, (ii) information comprising at least reference values of the tolerance thresholds, and comments assisting the operator's decision concerning the reading points, the sensors to be checked and the equipment to be checked and / or whose functional state is to be modified, (b) copy the recording made in (a) into a microcomputer pr otable connected to a radiofrequency transmitter / receiver, (B) during the round, (a) at each passage to a reading point, (i) carry out a validation attesting the passage to the reading point; at each validation, a location point signal is transmitted by the transmitter connected to the portable microcomputer to the receiver connected to the central computer and recorded in the central computer, (ii) checking the measurement points to be; the measuring points delivering information, record this information in the portable microcomputer, and compare it with the prerecorded information concerning these measuring points so as to detect any anomaly, (iii) check and / or modify the functional state of the equipment before the '' be, record information concerning this equipment and compare it with the pre-recorded information concerning this equipment so as to detect any anomaly, any detection of anoma Lie in (ii) and in (iii) causing a transmission on the part of the transmitter from the portable microcomputer to the central computer receiver, (D) at the end of the round, the information recorded in the portable microcomputer is copied   in the mainframe in order to be processed.   2 Method according to claim 1, characterized in that, following steps (B) (a) (ii)   or (B) (a) (iii), the sequence of survey points -   (12), sensors (10) and equipment (11) is possibly modified, a radio frequency transmission from the portable microcomputer (26) to the receiver of the central computer (22) informing the computer central (22) of modifications.   3 Method according to claim 1, characterized in that, following steps (B) (a) (ii) or (B) (a) (iii), the round is interrupted, radiofrequency transmission from the portable microcomputer (26) to the central computer receiver (22) informing   The main computer (22) of the interruption.   4 Method according to claim 3, characterized in that, after an interruption, the round is optionally resumed from any which survey point (12).   Method according to claim 1, characterized in that the validation of a reading point (12) consists in reading an associated bar code at the survey point (12).   6 Method according to claim 1, characterized in that a file of the survey points (12) and their location on the site (5) further containing a list of sensors (10) and equipment (11) grouped at each survey point (12) is   stored in the central computer (22).   7 Method according to claim 6, characterized in that the sequence constituting   the round is determined from this file.   8 Method according to claim 1, characterized in that the sequence constituting the round is chosen from a list of previously established sequences recorded in the computer central (22).   9 Method according to claim 1, characterized in that a theoretical duration necessary for the journey between each reading point (12) is recorded in the central computer (22); during the round, after each validation a clock is triggered by the central computer (22); if the following validation is not carried out after the theoretical time has elapsed, an alarm is   triggered by the central computer (22).